I think Charlie would say they are probably loaded down with CNS work from sprints (maybe even more than an average athlete like me because they have a much greater ability to burn their CNS through sprints) and all they have left is what you see them use in the weight room. Plus, sprinting is not a absolute strength sport so is there really a need to prove that they can express absolute strength in a 1rm…
Also it’s not like Tyson or Powell can’t bench 275-300 or so if they had to max out which is good for an athlete that does not have a huge requirement for absolute strength. Sure there are footballers who lift more, their sport requires a large amount of absolute strength at most positions.
One thing I go back and forth on in my head is whether lesser talented, average speed athletes should work more on strength and heavier weights than the gifted world class we are discussing. On one hand I think they should do pretty similar training to the world class guys realizing their results will fall in line with their natural talent anyway.